Valve



W. S. RALSTON. A

VALVE.

APPLICATION FILED JULY l5. 1920.

Patented Nov. 22, 1921.

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lUNITED STATES PATENT OFFICE.

WILLIAM S. RALST'ON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO THE CHAPLIN- FULTON MANUFACTURING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A COR PORATION F PENNSYLVANIA.

VALVE.

Application led July 16,

To all whom it may concern.'

Be it known that I, lYILLIAM S. RALsToN, of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In the use of the Fulton gas relief valve in natural gas gasolene plants for allowing the treated gas to escape after the compression has reached the stage where all the gasolene has been remo-ved from the gas under treatment and permitting inflow of a fresh supply of under-treated gas, dilliculty has sometimes been experienced by generation of frost which freezes the valve causing it to stick and lock. It is the object. of my invention to provide a simple and highly eflicient means for preventing this freezing of the valve, and this without the necessity of adding numerous parts to the valve as a whole. lVhile my improvement is particularly applicable to relief valves of the type described, it is also useful in connection with other forms of valves where there is liability of the valve sticking to its seat because of freezing of the fluid which the valve is designed to control.

In the drawing Figure 1 is a view in side elevation, parts being shown in section. Fig. 2 is a sectional view on line 2*2, Fig. 1. Fig. 3 is a detailed perspective of the plug of the valve.

The relief valve shown herein is, in the main, of the type described in Letters Patent granted on the application of Louis 13. Fulton, September 15, 19111, and numbered 1,110,320, and includes a casing 1; inlet 2 and outlet 3. The main valve l is normally held to its seatby the pressure at the inlet aided by the action of a spring At 6 I have shown a gas chamber with a diaphragm 7 adapted for unseating the main valve against the inlet pressure and the tension of the spring 5, and 8 indicates a con` nection between the gas chamber and the inlet side of the main valve, a pilot valve 9 being seated within such connection. Similarly there is a connection 10 between the gas chamber and the outlet side of the main Specification of Letters Patent.

Patented Nov. 22, 1921.

1920. serial No. 396,731.

valve with an outlet pilot valve 12 in such connection. Upwardly extending stems of the valves 9 and 12 are the means through which power of a lever 13 is applied to actuate these valves. The means for moving the lever to overcome its weight 14 is a superposed chamber 15 with a diaphragm 16 which effects the downward movement of a slidable member 17, and a tilting of the lever when the pressure for which the valve is adjusted attains a maximum.

The plug is formed with an upwardly extending portion 21 which is threaded for screw fitting with the casing 1. This upwardly extending portion is then turned back upon itself and extends downwardly in spaced parallelism with its upwardly extending portion to form a chamber 22 for the circulation of steam, the cup 23 formed by this construction providing a seat for the spring 5 of the valve. Near the lower eX- tremity of the cup a guide 211 is provided for the spindle of the valve. Ports 25, 26 are designed for connection with a steam line. Steam circulating within the chamber 22 will radiate sutlicient heat adjacent the valve to prevent sticking and locking of the valve due to freezing.

It will be appreciated that I have produced a simple and inexpensive means for preventing' freezing of the valve and that the bottom plug is so formed as to function for the purpose of radiating heat and as a seat for the spring of the main valve.

I claim as my invention:

1. In combination with a valve and its casing, a plug for said casing having an inclosed chamber for a heat radiating fluid in uxtaposition to said valve and separated therefrom by the walls of said chamber, said plug having inlet and outlet ports coni municating with said chamber.

2. In combination with a valve and its easing, and a spring for controlling said valve, a plug for said ca sing forming a seat for said spring, the walls of said plug being' spaced to form a chamber foil a heat radiating fluid such chamber encircling said spring seat, said plug having inlet and outlet ports communicating with said chamber.

3. In combination with a valve and its casing, and a spring for controlling said valve, a bottom plug for said casing comprising an upwardly extending portion circled by said upwardly and downwardly adapted for screw threaded engagement with extending portions of the plug, said plug said casing, a downwardly extending porliavng inlet and outlet ports communicating 10 tion in spaced relation to said upwardly exwith said Chamber.

5 tending portion, the space between said por- In testimony whereof I have signed this tions forming a chamber for a heat radatspecilication. ing fluid, and a seat for said spring en- WILLIAM S. RALSTON. 

